Malicious PDF — malware analysis report

Static analysis result for SHA-256 037a8942c9eea907…

MALICIOUS

PDF

42.4 KB Created: 2021-04-27 16:22:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e52d1a3c229902df3faf0cfa6a80149c SHA-1: 12a32c610d41f274aad932708d6efef6b6a700f3 SHA-256: 037a8942c9eea9072942aa25c007fd99bd17ea58f2d27bc283f20d9c59596bfe
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-a-human-verification-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-stuff-roblox-march-2021.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/rbxrocks-free-robux.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-promo-codes-october-2021.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-mode-menu-works-roblox.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/what-would-noobs-do-with-free-robux.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/6-pack-roblox-shirt-for-free.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-roblox-como-tener-robux-gratis-2021-octubre.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-cheat-engine-bypass-2021.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/proxo-cheat-roblox-download.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-grow-simulator-roblox-2021.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004489.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4489 26284 bytes
SHA-256: a64d95b8bbf819df6f2f455208461a871901f4fe2e72b6e1469741302489aa0f
font_01_sfnt_off000080c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C4 19388 bytes
SHA-256: 74b79d0e99834e1a86ffcaa35c6294bef9b076f0c8f4ab8bc168f18b6a66d2c6

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